hopr_crypto_packet::packet

Struct MetaPacket

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pub struct MetaPacket<S: SphinxSuite> { /* private fields */ }
Expand description

An encrypted packet.

A sender can create a new packet via MetaPacket::new and send it. Once received by the recipient, it is parsed first by calling MetaPacket::try_from and then it can be transformed into ForwardedMetaPacket by calling the MetaPacket::into_forwarded method. The ForwardedMetaPacket then contains the information about the next recipient of this packet.

The packet format is directly dependent on the used SphinxSuite.

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impl<S: SphinxSuite> MetaPacket<S>

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pub const HEADER_LEN: usize

The fixed length of the Sphinx packet header.

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pub const PACKET_LEN: usize

The fixed length of the padded packet.

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pub fn new( shared_keys: SharedKeys<S::E, S::G>, msg: &[u8], path: &[<S::P as Keypair>::Public], max_hops: usize, additional_relayer_data_len: usize, additional_data_relayer: &[&[u8]], additional_data_last_hop: Option<&[u8]>, ) -> Self

Creates a new outgoing packet with the given payload msg, path and shared_keys computed along the path.

The size of the msg must be less or equal PAYLOAD_SIZE, otherwise the constructor will panic. The caller must ensure the size is correct beforehand. The additional_data_relayer contains the PoR challenges for the individual relayers along the path, each of the challenges has the same size of additional_relayer_data_len.

Optionally, there could be some additional data (additional_data_last_hop) for the packet destination. This is reserved for the future use by SURBs.

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pub fn into_forwarded( self, node_keypair: &S::P, max_hops: usize, additional_data_relayer_len: usize, additional_data_last_hop_len: usize, ) -> Result<ForwardedMetaPacket<S>>

Attempts to remove the layer of encryption of this packet by using the given node_keypair. This will transform this packet into the ForwardedMetaPacket.

Trait Implementations§

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impl<S: SphinxSuite> AsRef<[u8]> for MetaPacket<S>

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fn as_ref(&self) -> &[u8] ⓘ

Converts this type into a shared reference of the (usually inferred) input type.
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impl<S: SphinxSuite> BytesRepresentable for MetaPacket<S>

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const SIZE: usize

Size of the encoded byte array.
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fn into_boxed(self) -> Box<[u8]>

Convenience function to copy this type’s binary representation into a Box.
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impl<S: SphinxSuite> Clone for MetaPacket<S>

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<S: SphinxSuite> Debug for MetaPacket<S>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<S: SphinxSuite> TryFrom<&[u8]> for MetaPacket<S>

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type Error = GeneralError

The type returned in the event of a conversion error.
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fn try_from(value: &[u8]) -> Result<Self, Self::Error>

Performs the conversion.

Auto Trait Implementations§

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impl<S> Freeze for MetaPacket<S>

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impl<S> RefUnwindSafe for MetaPacket<S>
where S: RefUnwindSafe,

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impl<S> Send for MetaPacket<S>
where S: Send,

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impl<S> Sync for MetaPacket<S>
where S: Sync,

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impl<S> Unpin for MetaPacket<S>
where S: Unpin,

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impl<S> UnwindSafe for MetaPacket<S>
where S: UnwindSafe,

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where T: 'static + ?Sized,

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